水资源与水工程学报2024，Vol.35Issue(2)：107-114,8.DOI:10.11705/j.issn.1672-643X.2024.02.12
底流消能诱发泄洪闸闸墩振动问题分析和减振措施研究
Analysis of floodgate pier vibration induced by underflow dissipation and vibration reduction measures
摘要
Abstract
Underflow dissipation floodgates are subjected to severe pier vibrations during high-flow dis-charge.Addressing to this issue,the hydraulic elasticity model test and prototype observation of a hydro-power station were conducted,with which two vibration reduction measures of improving pier structure and optimizing reservoir regulation schemes were proposed.The model test provided data support for the analysis of pier vibrations,while the prototype observation validated the reliability of the model test.When the discharge flow is 5 400 m3/s,the combined discharge approach of"low orifices and surface or-ifices"can reduce the flow through surface orifices from 5 400 m3/s in standalone discharge to 1 919 m3/s in combined discharge,and the rest 3 481 m3/s can discharge from the low orifices.In this case,the standard deviation of pier vibration displacement at surface orifices decreases from 182.3 to 51.7 μm,achieving a vibration reduction effect of 71.6%.When the discharge from the surface orifices rea-ches 10 030 m3/s,reinforcing the piers can reduce the standard deviation of pier vibration displacement from 288.8 to 129.6 μm,leading to a vibration reduction effect of 55.1%.关键词
底流式泄洪闸/闸墩振动/减振措施/模型试验/原型观测Key words
underflow dissipation floodgate/floodgate pier vibration/vibration reduction measure/mod-el test/prototype observation分类
建筑与水利引用本文复制引用
刘昉,刘晴,李火坤,黄伟,柳波,唐义员,李玥康,王文韬..底流消能诱发泄洪闸闸墩振动问题分析和减振措施研究[J].水资源与水工程学报,2024,35(2):107-114,8.基金项目
江西省双千计划科技创新高端人才项目(jxsq2023201017) （jxsq2023201017）
江西省水利厅重大科技项目(202325ZDKT05) （202325ZDKT05）
